I just wanted to let you know, you're not the only one.I'm using the IRremote library, a meter worth of strip lights, an IR receiver and an old stereo remote.Keep getting invalid code errors which eventually crashes the whole thing and the chip has to be rest. Tried it on a breadboard, same results. I thought I was getting noise through the voltage, and with your readings, I'm sort of correct. I'm out of ideas myself.

These are cheap IR receivers (by price at least ~34 cents). I haven't used them.According to this datasheet:http://www.hyzt.com/manager/upimg/200987165540.pdfThere are some external - 2x capacitors & 2xresistors required(or suggested) for the IR recevier circuit.

It was hard to read the DS, but it seems to suggest that the modulation frequency is centered on 38kHz, which should be OK. But unlike the earlier post it doesn't give any details on attenuation at other frequencies. (= low quality??)

I also saw a post on another forum, where somebody had left out a resistor when using a FET to drive this particular LED and which resulted in lots of interference. (can't remember details sorry)

Yes they are cheap IR's, 5 for 1.34, I can't complain...well, I suppose I can a little.I did hook up the caps and resitors as per blurry ds I found, this happens with the proper parts in place.I've unhooked them before to see if that could be the problem after reading the adafruit tut that doesn't use the caps and such, the readings were even worse.

These are cheap IR receivers (by price at least ~34 cents). I haven't used them.According to this datasheet:http://www.hyzt.com/manager/upimg/200987165540.pdfThere are some external - 2x capacitors & 2xresistors required(or suggested) for the IR recevier circuit.

It was hard to read the DS, but it seems to suggest that the modulation frequency is centered on 38kHz, which should be OK. But unlike the earlier post it doesn't give any details on attenuation at other frequencies. (= low quality??)

I also saw a post on another forum, where somebody had left out a resistor when using a FET to drive this particular LED and which resulted in lots of interference. (can't remember details sorry)

I know this thread is a bit stale, but in case anyone else bumps in to this problem, I think I was having it too, and I found a solution.

The problem is that the LED control libraries and the IR receiver libraries are both super time dependent, and they end up fighting over the arduino's interrupts causing them to produce garbage when used together.

I used a pair of connected arduinos to get around it and achieve remote controlled animation sequences on addressable LEDs without losing performance with the LEDs and without dropping commands from the remote.